95 lines
2.9 KiB
Rust
95 lines
2.9 KiB
Rust
use quote::ToTokens;
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use std::fs;
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use std::path::{Path, PathBuf};
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use std::sync::Arc;
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use crate::config::Config;
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use crate::error::*;
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use crate::optimizer::Optimizer;
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use crate::parser::Parser;
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use crate::resolver::Resolver;
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use crate::translator::{TranslatedSource, Translator};
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use crate::util::{read_to_string, rustfmt_block};
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pub struct CompilationReport {
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pub deps: Vec<PathBuf>,
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}
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#[derive(Default)]
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pub struct Compiler {
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config: Config,
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}
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impl Compiler {
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pub fn new() -> Self {
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Self::default()
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}
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pub fn with_config(config: Config) -> Self {
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Self { config }
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}
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fn translate_file_contents(&self, input: &Path) -> Result<TranslatedSource, Error> {
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let parser = Parser::new().delimiter(self.config.delimiter);
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let translator = Translator::new().escape(self.config.escape);
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let content = read_to_string(input)
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.chain_err(|| format!("Failed to open template file: {:?}", input))?;
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let stream = parser.parse(&*content);
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translator.translate(stream)
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}
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pub fn compile_file(
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&self,
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input: &Path,
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output: &Path,
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) -> Result<CompilationReport, Error> {
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// TODO: introduce cache system
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let input = input
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.canonicalize()
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.map_err(|_| format!("Template file not found: {:?}", input))?;
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let include_handler = Arc::new(|child_file: &Path| -> Result<_, Error> {
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Ok(self.translate_file_contents(&*child_file)?.ast)
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});
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let resolver = Resolver::new().include_handler(include_handler);
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let optimizer = Optimizer::new().rm_whitespace(self.config.rm_whitespace);
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let compile_file = |input: &Path,
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output: &Path|
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-> Result<CompilationReport, Error> {
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let mut tsource = self.translate_file_contents(input)?;
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let mut report = CompilationReport { deps: Vec::new() };
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let r = resolver.resolve(&*input, &mut tsource.ast)?;
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report.deps = r.deps;
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optimizer.optimize(&mut tsource.ast);
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if let Some(parent) = output.parent() {
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fs::create_dir_all(parent)
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.chain_err(|| format!("Failed to save artifacts in {:?}", parent))?;
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}
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if output.exists() {
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fs::remove_file(output)
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.chain_err(|| format!("Failed to remove artifact {:?}", output))?;
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}
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let string = tsource.ast.into_token_stream().to_string();
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fs::write(output, rustfmt_block(&*string).unwrap_or(string))
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.chain_err(|| format!("Failed to save artifact in {:?}", output))?;
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Ok(report)
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};
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compile_file(&*input, &*output)
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.chain_err(|| "Failed to compile template.")
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.map_err(|mut e| {
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e.source = fs::read_to_string(&*input).ok();
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e.source_file = Some(input.to_owned());
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e
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})
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}
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}
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